Q: How is the number 75,105,448 written in Scientific Notation?
A: 7.5105448 x 107
The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.
Calculating scientific notation for a positive integer is simple, as it always follows this notation:
a x 10b
Follow the steps below to see how 75,105,448 is written in scientific notation.
To find a, take the number and move a decimal place to the right one position.
Now, to find b, count how many places to the right of the decimal.
| New Number: | 7 | . | 5 | 1 | 0 | 5 | 4 | 4 | 8 |
| Decimal Count: | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
There are 7 places to the right of the decimal place.
Building upon what we know above, we can now reconstruct the number into scientific notation.
Remember, the notation is: a x 10b
a = 7.5105448
b = 7
Now the whole thing:
7.5105448 x 107
Check your work:
107 = 10,000,000 x 7.5105448 = 75,105,448
| 75,105,446 | 75,105,447 | 75,105,449 | 75,105,450 |
| 7.5105446 x 107 | 7.5105447 x 107 | 7.5105449 x 107 | 7.510545 x 107 |